Skip to main content

You are not logged in. Your edit will be placed in a queue until it is peer reviewed.

We welcome edits that make the post easier to understand and more valuable for readers. Because community members review edits, please try to make the post substantially better than how you found it, for example, by fixing grammar or adding additional resources and hyperlinks.

5
  • First step is to look at /var/log/Xorg.*.log to see what the X server is actually doing. Commented May 13, 2019 at 8:14
  • What is the reason for having two physical video cards? Are you actually trying to achieve a multiseat setup? When you say "no keyboard input on second screen" did you mean "no keyboard input on second seat"? Why use Nouveau instead of the Nvidia driver? You said that two of the monitors are plugged into the Vega. But then two monitors do not have any rendering? There seems to be a little overlap here if Nouveau is an issue with only one HDMI monitor. Commented May 20, 2019 at 19:36
  • (ezst036's comment, continued): When you said "but it only renders on one of them", if you are trying to make a multiseat system, did you mean that the login screen(In this case, GDM) only renders on one screen? Are you expecting multiple logins? I am curious if the particular cards work by themselves. In other words, if you hook all three monitors up to one video card and remove the second card. Does everything work(rendering etc) by itself properly as expected on the AMD? Does everything work as expected by itself only on the Nvidia? Commented May 20, 2019 at 20:08
  • Forgive me for taking too long to respond. So the eventual goal is a multiseat setup, but for now, I'm only doing a single seat with two cards. With just the AMD card, and nothing else, all three monitors work automatically, so I never tried to build a manual xorg configuration for that. With both cards, after fiddling around with some settings (but I don't know which one), I managed to get auto configuration to work. Commented May 26, 2019 at 15:49
  • And by "work," I mean center HDMI output connected to the NVidia card renders on the NVidia card, and side DisplayPort outputs connected to AMD card render on the AMD card. Before what I was getting was some kind of "pass-through" setup, where the video output displayed, but any 3D rendering was only on the NVidia card, no matter which output. Commented May 26, 2019 at 15:54